PHPWarningRuntime ErrorJune 13, 2026

Runtime Error

Cannot inherit from final YamlParser in /var/www/html/config.php on line 15

What This Error Means

This error occurs when trying to create a new class that extends a class that has been marked as final.

Why It Happens

This error typically happens when a developer tries to create a new class that extends a class that has been marked as final. This is because a final class cannot be extended by any other class.

How to Fix It

  1. 1To fix this error, you need to either create a new class that does not extend the final class or make the final class non-final by removing the final keyword from its declaration. Alternatively, you can create a new class that extends a different class that is not final.

Example Code Solution

❌ Before (problematic code)
PHP
class MyClass extends final YamlParser {
    // code here
}
✅ After (fixed code)
PHP
class MyClass extends AnotherClass {
    // code here
}

Fix for Cannot inherit from final YamlParser in /var/www/html/config.php on line 15

Related PHP Errors

Related PHP Blog Articles

Have a different error? Get an instant explanation.

Explain Another Error